Peginterferon alfa-2a has been approved by the U.S. Food and Drug Administration (FDA) to treat adults with chronic hepatitis C virus (HCV) infection with liver disease who have not been previously treated with interferon-alpha drugs (which improve immune system response to infection). Ribavirin has been approved by the FDA and is usually given in combination with interferon drugs such as peginterferon alfa-2a for treatment of chronic HCV.

Recent research shows that Latino whites do not respond as well to treatment with peginterferon alfa-2a and ribavirin as non-Latino whites. Various factors such as excessive weight, gender, and insulin resistance were evaluated to explain this difference, but research suggests that underlying factors related to Latino or non-Latino background, possibly genetic and immune differences, may be affecting the response to HCV infection and treatment. However, more research is needed on the effectiveness of peginterferon and ribavirin in Latino subjects with HCV, and with combined and human immunodeficiency virus (HIV) co-infection.

Objectives:

- To evaluate the safety, effectiveness, and viral response of peginterferon alfa-2a and ribavirin therapy for chronic hepatitis C in Latino participants with and without HIV co-infection.

This is an observational study. The observed treatment is received and managed through their primary care.

Hepatitis C is a major health problem affecting 100- 300 million individuals worldwide. Chronic hepatitis C virus (HCV) infection leads to cirrhosis in approximately 20% of subjects over a period of 1-20 years. Hepatitis C is now the most common indication for liver transplantation in the United States. infection occurs in one-third of all HIV-infected individuals, and the natural history among HIV-1 infected individuals demonstrates higher levels of HCV viremia, faster rates of progression and cirrhosis. There have been very few studies addressing the lower therapeutic response rates in minorities outside of African Americans. A recent study showed that Latino white subjects respond less effectively (34%) than non Latino white subjects (49%) given the same treatment even after adjusting for various important factors. As the current landscape for treatment of HCV changes, it would be important to evaluate factors responsible for therapeutic response in Latino patients.

This is a study to address the genetic, epigenetic, and proteomic expression during therapy for chronic hepatitis C in Latino participants with and without HIV co-infection. One hundred Latino participants who have evidence of chronic hepatitis C with and without HIV who are receiving treatment for HCV will be enrolled. The results of this study will enable us to explore reasons for the differential therapeutic response rates with Hepatitis C treatment in Latino participants with and without HIV coinfection.

Eligibility

Ages Eligible for Study:

18 Years and older (Adult, Senior)

Genders Eligible for Study:

Both

Accepts Healthy Volunteers:

No

Sampling Method:

Non-Probability Sample

Study Population

latino with or without HIV infection undergoing Hepatitis C treatment

Criteria

INCLUSION CRITERIA:

A subject must satisfy all of the following criteria to be eligible to participate in this study:

Latino ethnicity. Latino ethnic background will be defined as a geographic, historical, and cultural heritage shared among persons from Spanish-speaking countries in South and Central America, Mexico, and the Caribbean. Both parents and all grandparents of the participant have to be Latino, with Spanish as the primary language. Participants have to be white; native aboriginal Indians, Asians, and blacks will be excluded.

Age greater than or equal to 18 years.

Documentation of hepatitis C infection by demonstration of a positive test for hepatitis C antibody and HCV RNA level of greater than or equal to 2,000 IU/mL.

Documentation of HIV-1 infection in the second group of co-infected participants by a licensed enzyme-linked immunosorbent assay and confirmed by a Western blot or by HIV polymerase chain reaction positive.

Participants with HIV: CD4+ cell counts greater than or equal to 100 cells/mm(3) or CD4+ cell percentage greater than or equal to 14%.

Ability to provide informed consent and willingness to comply with the study requirements, storage of blood samples and clinic policies.

Participants must have a primary care physician managing medical problems.

For HIV infected participants, care provided by a primary physician must be consistent with the current DHHS guidelines. For those on therapy, HAART will be provided by their physician.

Willing to undergo genetic testing

About to start HCV treatment (with or without direct acting agents DAAs)

EXCLUSION CRITERIA:

A subject will be ineligible to participate in this study if any of the following criteria are met:

Unable to comply with research study visits

Have any condition that the investigator considers a contraindication to study participation.

Pregnant or breastfeeding women.

Patients with poor venous access

Contacts and Locations

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study.
To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below.
For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01182298